EP1691583A3 - LED driver - Google Patents

LED driver Download PDF

Info

Publication number
EP1691583A3
EP1691583A3 EP06101365A EP06101365A EP1691583A3 EP 1691583 A3 EP1691583 A3 EP 1691583A3 EP 06101365 A EP06101365 A EP 06101365A EP 06101365 A EP06101365 A EP 06101365A EP 1691583 A3 EP1691583 A3 EP 1691583A3
Authority
EP
European Patent Office
Prior art keywords
led
current
driver
led driver
linear mode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06101365A
Other languages
German (de)
French (fr)
Other versions
EP1691583B1 (en
EP1691583A2 (en
Inventor
Nam-in Byeokjeokgol Apt. 831-1502 Kim
Jeong-Il Sunny Valley apt. 104-1603 Kang
Joon-hyun Jogong Apt. 106-1301 Yang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP1691583A2 publication Critical patent/EP1691583A2/en
Publication of EP1691583A3 publication Critical patent/EP1691583A3/en
Application granted granted Critical
Publication of EP1691583B1 publication Critical patent/EP1691583B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/395—Linear regulators
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
    • G09B23/16—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for science of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/392—Switched mode power supply [SMPS] wherein the LEDs are placed as freewheeling diodes at the secondary side of an isolation transformer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Business, Economics & Management (AREA)
  • Algebra (AREA)
  • Computational Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Mathematical Analysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Theoretical Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Led Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The present invention relates to an LED driver for driving light emitting diodes. The LED driver comprises a linear mode driver to increase and decrease a linear mode current to make a current flow in the LED at a predetermined target current value and output it to the LED; and a switch mode driver to increase and decrease a switch mode current depending on whether the linear mode current exceeds a predetermined reference current value and output it to the LED. Thus, the present invention provides an LED driver having high power efficiency and light efficiency and minimal distortions of a driving current.
EP06101365A 2005-02-15 2006-02-07 LED driver Expired - Fee Related EP1691583B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020050012410A KR100628719B1 (en) 2005-02-15 2005-02-15 Led driver

Publications (3)

Publication Number Publication Date
EP1691583A2 EP1691583A2 (en) 2006-08-16
EP1691583A3 true EP1691583A3 (en) 2010-11-17
EP1691583B1 EP1691583B1 (en) 2011-11-09

Family

ID=36424592

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06101365A Expired - Fee Related EP1691583B1 (en) 2005-02-15 2006-02-07 LED driver

Country Status (6)

Country Link
US (1) US7394444B2 (en)
EP (1) EP1691583B1 (en)
JP (1) JP4559364B2 (en)
KR (1) KR100628719B1 (en)
CN (1) CN100481187C (en)
TW (1) TWI321307B (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100666549B1 (en) * 2003-11-27 2007-01-09 삼성에스디아이 주식회사 AMOLED and Driving method thereof
KR101245121B1 (en) 2005-06-10 2013-03-25 에이저 시스템즈 엘엘시 Regulation of electrical current through a resistive load
JP4653219B2 (en) 2005-06-10 2011-03-16 アギア システムズ インコーポレーテッド Multi-threshold charging of rechargeable batteries
SG139588A1 (en) * 2006-07-28 2008-02-29 St Microelectronics Asia Addressable led architecure
TWI487124B (en) 2006-08-25 2015-06-01 Sanyo Electric Co Solar battery module and solar battery module manufacturing method
KR101123709B1 (en) * 2006-10-25 2012-03-15 삼성전자주식회사 Display apparatus and control method thereof
JP2008130907A (en) 2006-11-22 2008-06-05 Samsung Electronics Co Ltd Driving device of light source lighting
JP5409399B2 (en) * 2007-03-15 2014-02-05 コーニンクレッカ フィリップス エヌ ヴェ Drive circuit for loads such as LED, OLED or laser diode
CN101663919B (en) * 2007-04-02 2013-07-24 皇家飞利浦电子股份有限公司 Driving light emitting diodes
US7535183B2 (en) * 2007-04-27 2009-05-19 Korry Electronics Co. Apparatus and method to provide a hybrid linear/switching current source, such as for high-efficiency, wide dimming range light emitting diode (LED) backlighting
EP2149281B1 (en) 2007-05-22 2012-06-27 Osram AG Illumination device and projection device with such an illumination device
CN102084717A (en) * 2008-07-04 2011-06-01 奥斯兰姆有限公司 Circuit configuration and method for operating at least one first and one second led
TWI394126B (en) * 2008-12-08 2013-04-21 Chunghwa Picture Tubes Ltd Driving circuit for led backlight system
US8093821B2 (en) * 2009-02-05 2012-01-10 The Hong Kong Polytechnic University Driving method for improving luminous efficacy of a light emitting diode
US8497478B2 (en) * 2009-03-31 2013-07-30 Osram Sylvania Inc. High voltage supply to increase rise time of current through light source in an optical sensor system
DE102009037576B4 (en) * 2009-08-14 2011-06-16 Osram Gesellschaft mit beschränkter Haftung Circuit arrangement and method for operating at least one LED
US20110115408A1 (en) * 2009-11-17 2011-05-19 S3J Electronics, Llc. Long life power supply
KR100986815B1 (en) 2010-02-05 2010-10-13 신봉섭 Constant current driving apparatus for light emitting diode
WO2012012638A1 (en) 2010-07-22 2012-01-26 Greenandsave, Llc Light engine device with direct to linear system driver
JP5569231B2 (en) * 2010-08-03 2014-08-13 株式会社ニコン Light emitting element driving circuit and display device
GB2491550A (en) * 2011-01-17 2012-12-12 Radiant Res Ltd A hybrid power control system using dynamic power regulation to increase the dimming dynamic range and power control of solid-state illumination systems
DE102011109338B3 (en) * 2011-08-03 2013-01-31 Dietrich Reichwein Device for storing electromagnetic energy
CN102243854B (en) * 2011-08-18 2013-10-16 深圳市华星光电技术有限公司 LED (light emitting diode) backlight driving method, liquid crystal display device and LED backlight driving circuit
CN102280089A (en) * 2011-08-18 2011-12-14 深圳市华星光电技术有限公司 Light emitting diode (LED) backlight driving method and circuit and liquid crystal display device
CN106063375B (en) * 2014-02-26 2019-02-19 飞利浦照明控股有限公司 Drive assembly
US11490477B2 (en) 2018-10-25 2022-11-01 Signify Holding B.V. Electronic controller apparatus and control method
CN113178172B (en) * 2021-04-16 2023-03-28 Tcl华星光电技术有限公司 Gray scale control method and display panel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6111367A (en) * 1998-01-22 2000-08-29 Hochiki Corporation Light emission circuit
US20010043113A1 (en) * 2000-05-12 2001-11-22 Taichi Hoshino LED drive circuit
US20020105373A1 (en) * 2001-02-08 2002-08-08 Minoru Sudo LED drive circuit
US20050073287A1 (en) * 2003-10-07 2005-04-07 Semiconductor Components Industries, Llc. Power supply controller and method therefor

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JP4013420B2 (en) 1999-09-06 2007-11-28 セイコーエプソン株式会社 LIGHTING DEVICE AND ITS DRIVE METHOD, LIQUID CRYSTAL DEVICE, AND ELECTRONIC DEVICE
KR100520721B1 (en) * 1999-12-14 2005-10-11 가부시키가이샤 다키온 Power supply and led lamp device
JP2002203988A (en) * 2000-12-28 2002-07-19 Toshiba Lsi System Support Kk Light emitting element driving circuit
JP2002244619A (en) 2001-02-15 2002-08-30 Sony Corp Circuit for driving led display device
GB0130411D0 (en) * 2001-12-20 2002-02-06 Koninkl Philips Electronics Nv Active matrix electroluminescent display device
US6825619B2 (en) * 2002-08-08 2004-11-30 Datex-Ohmeda, Inc. Feedback-controlled LED switching
JP2004093761A (en) 2002-08-30 2004-03-25 Toko Inc Backlight unit
CN1484213A (en) 2002-09-17 2004-03-24 王晓峰 Method and device for controlling luminance of large LED screen
JP3990251B2 (en) 2002-10-11 2007-10-10 Ｎｅｃディスプレイソリューションズ株式会社 Projection display
EP1411750B1 (en) * 2002-10-16 2009-07-08 CCS Inc. Power supply system for light emitting diode unit
JP2004157225A (en) 2002-11-05 2004-06-03 Plus Vision Corp Projector and image projection method therefor
JP2004311635A (en) 2003-04-04 2004-11-04 Olympus Corp Driving device, lighting device using the same, and indicating device using the lighting device
JP2005080353A (en) * 2003-08-29 2005-03-24 Toyoda Gosei Co Ltd Power supply device for led
JP3600915B1 (en) * 2003-10-09 2004-12-15 ローム株式会社 Switching power supply device and electronic device with display device
US7075250B2 (en) * 2003-12-02 2006-07-11 Seto Holdings, Inc. Three-component protective head gear powered by a rechargeable battery
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Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6111367A (en) * 1998-01-22 2000-08-29 Hochiki Corporation Light emission circuit
US20010043113A1 (en) * 2000-05-12 2001-11-22 Taichi Hoshino LED drive circuit
US20020105373A1 (en) * 2001-02-08 2002-08-08 Minoru Sudo LED drive circuit
US20050073287A1 (en) * 2003-10-07 2005-04-07 Semiconductor Components Industries, Llc. Power supply controller and method therefor

Also Published As

Publication number Publication date
CN1822084A (en) 2006-08-23
US20060181485A1 (en) 2006-08-17
EP1691583B1 (en) 2011-11-09
TWI321307B (en) 2010-03-01
CN100481187C (en) 2009-04-22
US7394444B2 (en) 2008-07-01
TW200630928A (en) 2006-09-01
JP4559364B2 (en) 2010-10-06
KR20060091504A (en) 2006-08-21
EP1691583A2 (en) 2006-08-16
JP2006229209A (en) 2006-08-31
KR100628719B1 (en) 2006-09-28

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